Plural-part bearing for spinning-and twisting spindles



Sept. 23, 1952 w. HOFFMANN PLURAL-PART BEARING FOR SPINNING-AND TWISTING SPINDLES Filed April 12. 1949 9 4 JW Wai ,ixi theia ccompanymne rawi i Patented Sept. 23, 1952 PLUFAL-PABT BEARING'EORSPINNING- T G' @FWQL Waugh Hof any Z r fw" ei'l nkl, ds'sign f Application April 12,1949, Serial No. 9 7397 s mm r 85 ""imSwitzegla nd January 14, 1,234.9" c i :It i known in the s nnin ecs m zdats t e ,bc ste step 9f p us in s fors innineamitwisting.spind es; as and to suspend the bolster and ste Bet-e9 :in the spind e .hqus ns. cah tt ne'esei st sp erical iace Q the .la t e It i mdr hgweven. that such a beatin a vm ."s fi'miently t ke i teaQQmnh ,oscillatiqn fti sni-ndlebladew qi r, set n by Lane unbalanced ye -n. selsase 4w eh f. e

cscillatiqnsqependronthespeed of r at pind e in .deseizveswet th Mis e V i qm exnerienqesct et thelat emsess ly Q ma ed. especia l when ahapqling lar e @139 ar p cka MQrsQYs the nanni s? .csci le abls' earin sle ve it e s i c stl von .scsoun le herssmeits 491. 5 Furthermore, relatively complicated, pa 1; giggiit al hasbc.en;mQP9 h.H- K t of spind e, to nterconnss'tele fi s and step, for example, by meansei; L say n s Ens bolster in uc spindl d .9? .Qt e lap ins ei stp themg e t i heks bl detinqspend ntl pi t he?! be, J- V intent. di a vantages-ssh w sp ps l s. .tnsrefpzehai sstibi JJJIQ QFL-in perticulery li n- .eallsneedra nee s .sinqetne qlst i s .4 ,byione o sfewes vefle lsrz. .5 he l'xa ia -resi'lien ein he sl me siectm -.Eor .the- ,purppse Q J t din s the ai qsie szie and dis van a es. e, -men acco din oflmsrvpnes prises a pheric llymo me i 01st ie d. is spring-pr ssed a a nst thesni l ,iscpnn cte -tqth ste th cuehs ,7 e lymovab exelation-: V a g ine bcl t rrhead uitab ;isaerqvi ed th. a -neckcompr sinea s ndgaxs es t 1 vmn- Awhelicalspryn i .qis se 9, the 4 nec h tweens id: xufland hea ehav Lg animsside diam ter WhiQhii smaller than .ttie wists 0f aidmfi andasnmitsi e diemeter whis 'ilesse 1 than: the; s id wi th. medysnia ecu lys 1 e eisgused fQI; inte c nnectin -stheibqls ernhea an step, abuttinm ai sttbe. uppe ends the ilsl .zeal;.sprin e hm h-i s.zmtliaily.I esnt ine.hea ..end.- which;= as; a: resess and QALiQ t.

its foot portion.

enyexamples fim Fig- 11 :issa perspentliy i 50, gg smstitne, spri .1 wh ch a step n- 1 w the pewter-head, an the in fiersliectiif views;

res-12 idB' st s1?. s t sps e yi. v .s V

Fig. 4 shows a'rfaxial'sectibn rp g se r x bled bearing structure,

5 Fig.5 hows a modification oftheir eansjconnecting the sleeve arid step, and v Figs. 6 and 7 are comparative schematic repr e seritatiohs fd rijexplaiiiing the mo est operation of a, spiridle hafvi-Iig av cc fiventional bearing 10 jagi a n-igei nrit am d" pf ,1 spindle halving a, bearing ge tra ily thereifi, comprises the Bolst r head I,

the cqnnecti ng sleeve 2 and thestepbear ng 3.

1 5h, ehtifrictibn iie'ar in'g (not shown): is amps-sea in the bcljster head I which is pioyided with a spherical bearing face anqsne cgs The lattertei minates in a. ruffj5'f hich 'is re 's'sed at El Ahelicaisp'ring' 1, having a'fi inside ditifietfl 2Q f z aji r than tiiefcutside 'diatnetef of the rum is screwed qntotheneck Athic'u'gh :the recess 6.

The lb ol ste'r'j'. head :I possesses an "nfular .jshoultier 8 which serves as ahabutmehtior tl'ie sieevelifidlfqi thefsaid sb fing I. f E

walll ed" be 0 a certaiii'res 40., i 1.2. and; step bearin .3 provide w th" aiisetproduction.

3 of spring 1, that is, in a position intermediate of the latter and the annular shoulder 8 of bolster I. In such position, the connecting sleeve 2 is pressed against the shoulder 8 of bolster head I through the spring I.

In order to anchor the plural bearing structure in the housing 11, the sleeve 2 is so adjusted that its hole I is aligned with the tensioning screw 18 which then is tightened. The conical tip of screw 18 engages the lower edge of the hole [5, thus depressing the sleeve 2. The flange bolster having a neck extending downwardly into said housing, said neck having a rufi spaced from the bolster proper, a sleeve fixed in said housing against longitudinal displacement, and overlapping the lower portion of the bolster neck,- said sleeve having an inwardly extending flange at its upper end spaced from the ruff, a coil spring mounted on the neck above the ruif, said neck having a recess formed therein and in the 13 of the latter thus is removed from the shoulder 8 of bolster head I, and the pre-stressed spring 1 pulls the partially spherical face of bolster head 1 against the corresponding semispherical seat in the head of housing ll. When the sleeve 2 occupies such latter position, its in dentations iii no longer carry the step 3 which now rests on the bottom of housing I! entirely independent of the connecting-sleeve 2 and only loosely guided on its circumference by the wall of the housing l1.

It will be appreciated from the above description that the assembly of the three bearing parts I, 2 and 3 is very simple.

The resilient flexibility of the connecting sleeve 2 is of importance in that the sleeve cross-section must be capable of being temporarily deformed in order to engage the indentations [6 of sleeve 2 in the holes 10 of step 3 and, thereafter, spring back into its initial shape. The modified connecting means shown in Fig. 5 operate on the same. principle of deformation. The connecting sleeve suitably is made of a thin-walled sheet iron tube, although other materials such as plastics also may be used.

Fig. 6 refers diagrammatically toa spindle of conventional design, in which the bolster and step 19 are rigidly interconnected in and through a common sleeve.

The spindleblade 2! when quiescent assumes the positionshown by dotted lines. When the yarn package is' eccentrically loaded, which practically always is the case, the spindle blade is deformed in'operation, for example, under the influence'of an the inherent formof oscillation of the spindle blade, and the spindle no longer 'runs smoothly. .Fig. 7 relates to'a spindle bearing arrange ment according to the present invention, in which the spherically formed bolster 23 is entirely"in dependent. of'the step 24, that is, loosely-connected to the latter'onlyto such extent that the step also is withdrawn when withdrawingjthe bolster 23 from thespindle housing. Such arrangement afiords radial guide means 'for the bolster 23, while maintaining the adjustability --in view of the various forms of oscillation of spindle blade 25 at different IOtaIYLSDBBdS. A point of special importance is the independence of bolster 23 from'the movements of ,ste'p 24, causing a faultless; smooth operationjof' the All the parts comprised in the bearing arrangement according to the present invention are dis- .tinguished byjstructural simplicity which renders the same particularly suitable forlow-cost mass ,WhatI claim as new and desireltd scur Letters Patent, f 1. In as'pindlegga'blade, a spindlehousing; a bolster seat 'towardoneendof'the housing, a

3. A spindle rufi through which recess the spring is screwed to be mounted on the neck, the flange of the sleeve also having a recess through which the spring'mounted on the neck is screwed in order to assemble the bolster and sleeve with the spring mounted between the flange of the sleeve and rufi of the bolster neck.

2. In a. spindle, a blade, a blade mounting housing having a substantially semi-spherical bolster seat, a bolster mounted on said seat and having, in part, a shape conforming to the shape of saidbolster seat, andbeing provided with an opening for reception of said blade, a step bearing resting on the bottom of said blade-mounting housing in spaced relation to said bolster seat, for receiving a portion of said blade, said step bearing and the blade-mounting housing at the position where the step bearing is located having relative sizes providing play between the step bearing and housing allowing limited movement of the step bearing and blade relative to the housing, a loose connecting means connecting the bolster and step bearing to such extent that the step bearing resting on the bottom of the blade mounting housing is entirely independent of said connecting means but providing means for withdrawing the step bearing from the housing, 1 l 3 according to claim 2 and in which the loose connecting means between the bolster and'step bearing comprises'a thin walled flexible Ttubejhavinga-loose'snap connection with the stepbeari g.

in 1 spindle, a blade, a blademounting housinghaving' a substantially semi-spherical bolster seat; a bolstermounted on said seat-and fhavi'ng, in'-part,-a'sha'pe conforming to the shape fo fjisaid" bolsterseat, and being 'provided with: an opening for receptionof said blade, a step bearing resting onthe bottom of said blade-mounting housing-fin spaced relation to said-bolsterfseat, forreceivinga portionof said blade, 'said'step bearing and the blade-mounting housing atlthe positionwhere the" step bearing .is locatd having relative*sizesproviding 'play between thel t gbeari'ng and-blade relative'to' the housingfla tube *looselyconnecting the bolster and step bearing but providing means for withdrawing the step bearing-from thehousing, means for positively securing said tube against; longitudinal-'movement lira position"providing-play for entirely independent "relative moveme t: between" said stepbearing and tube, and-play forrelative m'o've- 'miit between said bolsterandftube, said bolster "being-provided with a downwardly depending neek having an upwardly facing abutment spaced from the bolster prop er, said 'tubeoverlapping the bolster-i neck and havin a downwardly facin'g abutmentj andjspring' means provided beseated pcsitiv'ely securing the longituumm movement.

e. In a sume-la,

biade a blad moiinti'ng housing having a substantially semi-spherical bolster seat, a bolster mounted on said seat and having, in part, a shape conforming to the shape of said bolster seat, and being provided with an opening for reception of said blade, a step bearing resting on the bottom of said blade-mounting housing in spaced relation to said bolster seat, for receiving a portion of said blade, said step bearing and the blade-mounting housing at the position where the step bearing is located having relative sizes providing play between the step bearing and housing allowing limited movement of the step bearing and blade relative to the housing, and means loosely connecting said bolster and step bearing for Withdrawing the step 1.)

bearing from the housing while allowing rela- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 285,968 Chase Oct. 2, 1883 2,093,255 Stahlecker Sept. 14, 1937 2,283,963 Winslow May 26, 1942 FOREIGN PATENTS Number Country Date 586,642 Germany Oct. 25, 1933 

